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New peculiar stars identified on objective-prism plates
Tables are presented of 90 peculiar stars revealed on more than oneobjective-prism plate and 61 suspected peculiar stars based on a singlespectrum. The set of 90 peculiar stars includes 48 Ap, 32 Am, and 10stars with composite spectra. The stars were identified as peculiarstars during spectral classification in the regions of the OBassociations Cyg OB4, Cep-Lac OB1, and Cas OB9. The spectralcharacteristics of the different types of peculiar stars are discussed.
| The S201 far-ultraviolet imaging survey. II - A field in Cygnus
Far-ultraviolet imagery of a region in Cygnus, a 20 deg diameter fieldcentered near (1950) R. A. 21 h 31.2 m decl. +37 deg 25 arcmin, wasobtained by the S201 far-ultraviolet camera during the Apollo 16mission. In a 10 minute exposure covering the 1250-1600 A wavelengthrange (effective wavelength 1400 A), 730 star images can be detected,corresponding to a limiting ultraviolet magnitude of about m (1400) =10. Assuming nominal interstellar extinction values in this region nearthe galactic plane, this result corresponds to the detection of A0 Vstars to a distance of 300 pc and of B0 V stars to 1500 pc.Uncertainties in spectral classification and interstellar extinction forindividual objects are probably more significant than calibration ormeasurement errors. Most of the objects detected are identified withstars in the Smithsonian Astrophysical Observatory Star Catalog (1966),or the Catalog of Stellar Identifications (1979) or both, but 87 objectsremain unidentified (or are identified with late-type stars).
| New peculiar stars.
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Osservazione e dati astrometrici
| Costellazione: | Cigno |
| Ascensione retta: | 20h59m22.42s |
| Declinazione: | +35°28'28.5" |
| Magnitudine apparente: | 8.908 |
| Distanza: | 353.357 parsec |
| Moto proprio RA: | -2.4 |
| Moto proprio Dec: | -9.7 |
| B-T magnitude: | 8.874 |
| V-T magnitude: | 8.906 |
Cataloghi e designazioni:
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